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Note 3 - Impairment Charges (Tables)
 12 Months Ended
Dec. 31, 2017
Notes Tables  
Details of Impairment of Long-Lived Assets Held and Used by Asset [Table Text Block]
   
Successor
    
Predecessor
 
   
November 15
Through
December 31,
    
January 1
Through
November 14,
    
Year Ended December 31,
  
   
2017
    
2017
    
2016
    
2015
  
Goodwill impairment
   $
-
     $
-
     $
-
     $
22,554
  
Long-lived assets impairment
    
-
      
-
      
160,222
      
115,489
  
Intangible asset impairment
    
-
      
-
      
-
      
13,695
  
Vessel component impairment
    
-
      
-
      
2,586
      
365
  
Total reduction in value of assets
   $
-
     $
-
     $
162,808
     $
152,103